1 files changed, 80 insertions, 0 deletions
diff --git a/lib/subunit/python/subunit/tests/TestUtil.py b/lib/subunit/python/subunit/tests/TestUtil.py
new file mode 100644
index 0000000000..1b5ba9c293
--- /dev/null
+++ b/lib/subunit/python/subunit/tests/TestUtil.py
@@ -0,0 +1,80 @@
+# Copyright (c) 2004 Canonical Limited
+#       Author: Robert Collins <robert.collins@canonical.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+import sys
+import logging
+import unittest
+
+
+class LogCollector(logging.Handler):
+    def __init__(self):
+        logging.Handler.__init__(self)
+        self.records=[]
+    def emit(self, record):
+        self.records.append(record.getMessage())
+
+
+def makeCollectingLogger():
+    """I make a logger instance that collects its logs for programmatic analysis
+    -> (logger, collector)"""
+    logger=logging.Logger("collector")
+    handler=LogCollector()
+    handler.setFormatter(logging.Formatter("%(levelname)s: %(message)s"))
+    logger.addHandler(handler)
+    return logger, handler
+
+
+def visitTests(suite, visitor):
+    """A foreign method for visiting the tests in a test suite."""
+    for test in suite._tests:
+        #Abusing types to avoid monkey patching unittest.TestCase.
+        # Maybe that would be better?
+        try:
+            test.visit(visitor)
+        except AttributeError:
+            if isinstance(test, unittest.TestCase):
+                visitor.visitCase(test)
+            elif isinstance(test, unittest.TestSuite):
+                visitor.visitSuite(test)
+                visitTests(test, visitor)
+            else:
+                print "unvisitable non-unittest.TestCase element %r (%r)" % (test, test.__class__)
+
+
+class TestSuite(unittest.TestSuite):
+    """I am an extended TestSuite with a visitor interface.
+    This is primarily to allow filtering of tests - and suites or
+    more in the future. An iterator of just tests wouldn't scale..."""
+
+    def visit(self, visitor):
+        """visit the composite. Visiting is depth-first.
+        current callbacks are visitSuite and visitCase."""
+        visitor.visitSuite(self)
+        visitTests(self, visitor)
+
+
+class TestLoader(unittest.TestLoader):
+    """Custome TestLoader to set the right TestSuite class."""
+    suiteClass = TestSuite
+
+class TestVisitor(object):
+    """A visitor for Tests"""
+    def visitSuite(self, aTestSuite):
+        pass
+    def visitCase(self, aTestCase):
+        pass